As for the net if you are putting up 350 a year that is roughly 300 minutes you are saving over sitting there and twine tying.  So aside from getting the job  done faster you are saving around 5 hours of tractor time.  All our balers I have timed between net and twine and it is right around 45sec-1 minute longer to get fully twine tied and dumped compared to about 15 seconds net wrapped and dumped.  Of course it will cost you a couple dollars a bale for that luxury.

I have no real problems with our 6 series Deere, 1 model newer than the 35 series I believe, and pretty cheap.

Net bales shed water a lot better as well.