i do suppose i could mix and match,would you say it would sound better to use the gk 1001 head and the ampeg cab,or maybe a different cab ?
When I was looking to make my purchase, I was set on the GK head after trying it out at Guitar Center. All they had on hand there were the GK Backline cabs (among others). I really wanted to try the GK Neo line, but couldn't find any in my area. I wasn't impressed with the GK backline cabs and was looking to purchase an Avatar 212 and 210 based on what I read on here. I never got to try the Avatar stuff, but was ready to make the purchase based solely on what I read.
Before ordering though, I saw an Ampeg 610 on Craigslist for less than what the Avatar 212 and 210 would have cost me. I went to try it out, and it sounded great. I figured even if the Avatar stuff was better (hard to beat an Ampeg cabinet though), it wouldn't have been worth the extra money, so I went with the Ampeg cab.
The key is to try out a few options and see what you like... If you have a Guitar Center in your area, they're bound to have the GK head and Ampeg cabinets available to try out. If they really want to make a sale that day, they'll hook everything up for you so you can try it out.
If you're looking to buy... I say see what you can find used... If you can't find a GK head used, rmcaudio.com has the best prices (sometimes better than used from what I found when I was looking).
Also, if you're interested, read about Avatar cabinets on here, or check out their website:
http://www.avatarspeakers.com