Vvardenfell Imports, Apachii Heroes Store and Apachii Goddess Store are all compilations of some popular Armor and Weapon mods. If you do not mind having a new Weapon used against you first, You can try an overhaul mod like Oscuro's Oblivion Overhaul (OOO), Martigen's Monster Mod (MMM), and Francesco's (Frans), or even FCOM, but I would play an unmodded game before trying an overhaul mod. Look at "Files of the Month" on TESNexus or Planet Elder Scrolls for a good idea of what is popular and current.
If you are just getting in to Oblivion, then take a look at the first link in my signature. This website has information that will save you headaches when you start adding mods to Oblivion.