Vinny of here got a Lexa and was a little dissapointed with the quality of the case considering price.
How about a Eclipse with side window
It will be the best case for that sort of rig, the front IMO looks 100x better than the armours as it is in a different league in terms of quality.
EVERY review of a case unless it is a comparative one will say it is excellent, one thing to bear in mind is that any case, from the Estar Benz right up to the TJ07 could house a FX60 and a 7800gtx SLI rig just fine at stock.
The cases really come into there own in terms of performance to noise ratios and the build quality, be it no sharp edges or high quality materials.
Typically Thermaltake uses the cheapest materials and finnishes possible to enable them to make feature packed (which I have never needed or wanted) case. Lian Li for example give you literally just what you need, no more, no less, but present the apckage using literally the best metals and even use high quality rivets if you email asking about them.
I would personally steer clear of the p180 if your going for anything other than a silent rig, although almost every other case can be made to be as good as it, it is the easiest.
The armour is ok, but not a very popular choice, and it is beaten in everything by the eclipse, although the front on the eclipse is plastic, personally I prefer it to the armours attempt at being a gaming case.
If you browse the cases gallery there are a lot of Eclipse users, but only a couple of armour ones, which is testemount to the eclipses great cooling/noise ratio.
How about maybe one of the new Lian Li S80 cases coming out soon, I will be getting one certianly but I think it may just tip over your budget slightly.