Hi Top Gazza,
I bought an IS-10 a coupl eof months back and dont regret it

Like you I didnt want large speakers dominating the room so the small golf ball speakers were perfect, and they can still deliver quite a puch, mine fronts are actually balanced on the top of my plasma they are so small
The Sub woofer can really boom, but does need to be placed next to the TV as some of the mid range sound comes from it as the centre speaker isnt powerfull enough for it.
Im not sure how much you can get it, for but I bought it from digital point for £335 inc a HDMI cable, but I just looked and its now £409

good for me but bad for you I suppose. Also dont forget to order an optical cable so that you can connect it to your console or Sky box.
If you plan to connect the optical to more than 1 source then you will need to get a splitter as the IS-10 only has 1 optical input.
cheers
Dave