It's not that a 6wt won't handle the fish, it is just a bit light for many of the flies. I tend to use my 6-8's for bass, depending upon wind and flies that I'm using

I'd move to a least a 7 but more likely an 8. While I own several 9's, including some very nice sticks, I find 9wts to be much more tiring to throw for a day...

Try a fast action to toss those larger hair bugs and streamers... I wouldn't buy a rod in those weights without a fighting butt...

If at all possible put your hands on several rods that are within your price range

Personally, i just got a Loomis NRX and absolutely love it! It is more than a bit pricey, but it is so sweet!