1) For 6k, you could probably buy some decent used gear.
2) You can connect it to your PC, but it requires lots of tweaking. For eg, I can easily connect my guitar to the laptop, but it's a pan connecting it to the desktop. There's some settings issue. You need some technical knowledge about PCs and sound cards and drivers to get a decent sound out of ur PC.
ALso if ur PC is good enough, you can use softwares like amplitube, guitar rig3, revalver which are amp-modelling softwares. My experience with them has been quite satisfactory so far.
My gear, currently up for sale
Washburn X-16 anarchy - SOLD!!
duncan pickups - I wonder why Im selling these.