A set of Bilstein fronts and some good springs all round to match the sport dampers would be my advice, small outlay for a noticeable improvement in handling. I had B14 coilovers on my Golf GTI and the ride was amazing even with them wound all the way down (55mm drop). For a daily driver, the B4 range with some Eibach/H&R springs is ideal.
I'd also recommend anti roll bars, at the least get the rear one upgraded too. Another small outlay for a massive improvement in handling.