Basically the split is similar to this,
£50 - £60 skybox F3,F5 add an "s" if you want, HD box, now and next EPG.
Add a HDD and capable of recording. Sets like the old videos, Time, date, channel, duration etc.
£150 ish Blade, VU solo, for example, as above with 7 Day EPG, easier to set timer recording
one button timer recording,if you add a HDD.
£300 ish VU solo 2, VU duo, as above, twin tuner allows one program to be recorded while watching another,
if you add a HDD.Plus bells and whistles.
Seen Ibox for £90 which is basically a VU solo clone, from what I can gather, also blade supposed to be bringing out
a box for approx £80, but haven't seen the spec. Guessing these are basically going to undercut the £150 boxes, and give you a 7 day EPG.
There are plenty of other boxes out too, but the ones mentioned seem to be pretty popular.