Right.... arb's looking at £500 odd foor neuspeed one, polyflex bushes you can buy them ready fitted to lower arms from ebay for £80 odd search for Mk2 Golf ones (
Ibiza are the same).
Be honest along with the arb's upper front and rear strut brace will be fine. KW I haven't heard the best about them and a KW demo BMW M3 couldn't stay with me through the bends at silverstone lol... Recomend Bilsten all the time. If your budget won't go for £750+ on suspension then go for a fixed drop, corner weight set up on coilovers would be ideal but if it's just for road do it at a later time. Rear spacers 15mm are a must!
You could easily fit the strut braces & spacers yourself!
If you want engine mods can get away with suspension and spacers on that list and then filter, exhaust, decat maybe a manifold if you can find one might be lucky enough to get cam fitted and set up.