I cannot imaging using Sandbox with a controller...that would be hell.
The forge in halo is made of rage and irritation :/
You can make some cool stuff, but you know you could do it in a twentieth of the time with the proper tools. You never used Reachs forge then or you just don't know how to. An besides I'd rather spend a few hundred dollars on a console that is good for at least 7 years then have to spend the same for a pc every year for the best upgrades
A pc would last for 7 years playing console games at console resolution (low) and quality (low) easily. And yes, i've used the halo forge extensively, and it's crap compared to pc editors but great compared to what console users have otherwise (that is, nothing). Don't assume (wrongly) that someone with an opinion differing from yours can't possibly have played what you have (forge would be fine with a kb+m, well, a lot easier). I did, i know better because i've used far better with the right tools.
Also, ever considered that burden of £10 extra per game and £40 a year for xbl? and the big fat elephant in the room that is you need a pc to be seeing this very forum if you use an xbox? it all adds up, and the sad fact is console gaming is far more expensive. If you doubt it i'll turn up the heat (well, maths).
Also, consider thus: you're one lucky git to have an xbox last 7 years. I know someone who's gone through 9 in 5 years, and i don't know anyone who's still got their original one (unless it was an elite like mine, but even then, they still break). Consoles aren't reliable enough any more to assume they'll last.