Check out Richer Sounds then, the NAD C355 amp is £249 (as per the WHFS&V ad this month). It'll do you the bass you need, you can add a power amp, it was nearer double the money on original release and there isn't anything else at the price comes near it.
Sometimes brands get trotted out, but for the money, you get a whole lot of amp for the money. Okay, the Titanium (posh grey) finish might not appeal, but hell, your there otherwise.
Get another £400 together and stick some Leema Xeros on the end of it and you'll rock aplenty. Failing that, see the aforementioned Qs if you want floorstanders (the Leemas being standmounts).