[AudioSonicSound]

Hello all - greetings from Croatia! My first post, I just registered.
 
I use Sennheiser HD 598, I love them.
 
At the moment I have Magnum IA.170 integrated amplifier, which has a headphone jack, just like all of my prior amplifiers had. But now for the first time I plan to buy amplifier which won't have a headphone jack. I will buy either JOB 225 power amplifier or JOB INTegrated amplifier: http://www.jobsys.com/products.htm. If I buy JOB 225, obviously I will also need to buy a preamplifier. The best choice would be to go with their JOB Pre2; but then, both JOB components with two of their powercords would cost $4000, which is too much for me right now.
 
I also have:
- Valab DAC-X9 - http://cdn.head-fi.org/d/d3/d37acb36_t2ec16rhjiie9qtykdjlbrk.jpeg
- Vincent CD-S3 - http://forums.newtek.com/attachment.php?attachmentid=38933&d=1163624299
 
I know that there are many head-amps which are also preamps and even DACs, all-in-one.
Also what matters here is that even if I get a CD player with awesome built-in DAC, I still need a separate DAC component because I need it to connect my PC to a DAC before going to amp.
 
What I hope to learn here is WHAT IS A BETTER CONCEPT AND WHY, which road to take:
 
a) 5 different devices: power-amp + preamp + CD player + DAC + head-amp
b) 4 different devices: power-amp + preamp + CD player + head-amp with built-in DAC
c) 3 different devices: power-amp + preamp/head-amp/DAC all in one + CD player
d) 4 different devices: integrated amp + CD player + DAC + head-amp
e) 3 different devices: integrated amp + CD player + head-amp with built-in DAC
 
I know that this question might sound dumb, but please bear with me: I don't actually know for the last two concepts - can I have head-amp at all with integrated amplifier??
 
Thank you very much in advance.