Technics SL 1200GR with What Cartridge???

I'm starting yet another thread on a similar topic, because I don't want to hi-jack someone else's thread, and I haven't found the answer to my question in other threads.

OK... I'm considering returning to vinyl for some of my listening and I need a Cliff's Notes version of what cartridges I might want to use.  

I've had a Linn Sondek LP12 for years, which I've barely used... but... it's been in storage.  As I recall it was pretty "finicky" and required a lot of attention to perform it's best (which was/is good).  I don't have enough patience anymore to deal with that, and am planning on moving to a Technics SL 1200GR, because it seems simple to operate, gets good reviews and doesn't seem to require a lot of attention. 

It appears that you can get great sound quality from the 1200GR with a good cartridge.  I'm just not sure what might be optimal / best for the money.

I also do not want to go crazy with esoteric cartridges that cost a mint.  My budget is probably in a range of... say... $300-400 to maybe $800-900 (if the cartridge is noticeably better than the more modestly priced cartridges).  

My Linn cartridge is a MM cartridge, I think (Basik or K9) in an Itok arm.  

That's about it.  

I'm not really interested in considering a lot of alternatives either in a turntable, or cartridges.  

Any guidance in this context would be appreciated.