It's never really bothered me before but after playing sessions of Skyrim and Morrowind for so long Oblivion's level scaling is really pushing me now.

I know there is Obscuro Overhaul, Franceso leveled creature as well as a a combination of those two in the FCOM mod but I'm not sure which one is best.

So before I wreak my save, I wanna know people's opinions on these mods.

I use Franceso's Leveled Creatures and Items mod (not the one that adds new creature/items). It comes with an installer so installing was easy. Just make sure to use BOSS and the mod is activated.

Personally, I like it because creatures are more diverse than just "one species" at a time. Also, it is nice to see NPC's with variations of loot and armor/weapons.

I'm using OOO and Masker's (http://www.nexusmods.com/oblivion/mods/42780/?) currently.

While I am still battling some issues in my install, it has nothing to do with these two mods. Whatever you decide, I would suggest at least looking at Maskar's Oblivion Overhaul. It is still actively supported and makes some really cool changes. It is also quite compatible with other overhauls like OOO, Frans, FCOM, etc.

I would search the forums, there are some overhaul comparisons. I personally have played around with OOO, FCOM, Oblivion Intensity, and TIE. They all have their pluses, but I would caution you to not get too crazy. It is very easy to fall into the hole of overmodding your game and ending up doing nothing but modding and never playing. Avoid mods for things you are not doing and keep it as simple as possible.

I will also put in a slight plug for dreamed1's Guild Enhancements (http://www.nexusmods.com/oblivion/mods/42870/?) as I really am a big fan. I would never play without it now.

With Waalx Animals and Creatures every creature is completely unleveled. The creatures you see at level 1 are same you see at level 30 and above. Boy are they ever unleveled, get ready to die a lot in the early levels if you use it. I still like it though, its what I use. And it adds a great deal to the variety of creatures, weapons, and armor, and they all look great too. You can find it at TES Alliance if you want to know more http://tesalliance.org/forums/index.php?/files/file/1318-wac-waalx-animals-creatures/

Edit- Oh and it adds beards, yes real beards like in skyrim. So if you like that check it out.

I most often play with a combination of Oscuro's mod and Martigen Monster Mod. Oscuro's mod brings back a lot of the feel of Morrowind with its hand-placed loot and tighter control of leveling and scaling. It also provided lore=based reasons for enemies to be where they are, rather than merely plopping them down wherever they seem remotely plausible. I have always seen Oscuro's mod as much a roleplaying mod as anything else. This is what distinguishes it, in my mind, from the other overhauls.

I think Martigen complements this perfectly in that it adds a feeling of spontaneity and randomness to Oscuro's static placement of loot and enemies. With Martigen's mod running you never quite know what is going to happen, even if you reload the same save several times.

My main gripe with the way Bethesda handled leveling in Oblivion is with loot, not enemies. I'm actually pretty okay with enemies leveling and scaling with my character, as that provides a fair amount of consistent challenge as she gets stronger. It is Oblivion's heavy-handed, tone-deaf, obsessive use of loot leveling that I truly despise. So in some games I play with vanilla enemies and use http://www.nexusmods.com/oblivion/mods/3321/? by itself.

G's mod comes in scaled and unscaled versions. I always use the unscaled version in my games, as that is the one that does the most to stop Oblivion's horrid abuse abuse/overuse of item leveled lists and injects a bit of variety into what I find on enemies and in containers.