All the cars are 1.6 for tax / emission reasons *yawn* (unles you got a hybrid thing) - if I could change I would. However I end up earning money by having a company car (in terms of getting my fuel paid for my mileage), and I do so many miles I don't really want to buy my own, my car allowance is only around 4k so not really worried about getting that. At least I get a brand new car for a few years, it's serviced and looked after for me.
Most of the tuners I've spoken to thanks to your help have said around 140bhp after remap and over 220 lbft of torque - which is noticeable to me.
I'm not worried about the warranty or dealer - the FM is not a nob, and had said if the price is reasonable, and is happy with what is offered, he'd sort it all out.
IF this turns out to be too much of a fuss, I can just carry on without a care in the world. Ultimately, it's not my car, and don't really care about it - but if I'm going to get lumbered with something that is less pokey, might as well try and make it a little more pleasant to drive. The car itself is really nice (IMO) for what it is.