recently I have been looking differently into Kontak and I gotta say, 4 a soft-sampler this is probably yer best bet.
I would definatly go for a proper sound card if u wish 2 go the software way...
Good monitors seem 2 b missing in yer list...
Alesis Monitor1 Mk2... if u can afford Mackie HR824!
I seem 2 have a keyboard already so I would save some money and get a dedicated controller surface like the evolution uc33.
Sound card I would recomend RME 9632 on a budget or a Multiface+PCI interface if u can spend a little more!
Don't forget that if u go the software way u shouldn't make yer soundcard yer weakest link!!!
Check some old posts as there are some of these querys already m8.
MPC.. u can still use it as a sequ. sampler, and then record the mid file and take it 2 cubase for arranging and sequencing... I would definatly hold on 2 it 4 a short while 'till u get used 2 the new system, by then U'll know how much u need it or not!!
Z
Z