I started with an MFJ-904H. It did the job and worked well portable as it was quite light. I found having a decent meter for swr and power to be very helpful.
However I recently scooped an LDG YT-100, it is brilliant. Much less mucking around and I've checked it with the MFJ and it tunes in very well. I've been told that it will tune a rusty nail, I don't know if that is true, but it certainly tunes in things I was struggling with using the manual tuner. Of course however, that's no indication of how good a signal it is putting out.
I would choose the LDG YT-100 if I did it all again.
Larry's comments are very good though, make sure you read that. Also, the LDG tuner drops the power when it tunes.
regards
andrew
vk2pez
Andrew