Sickntired, the best way to get a rabbit to eata different brand of pellet is to mix it with their old food for a fewdays. When he starts eating the new stuff, slowly increasethe proportion of new to old until he's only eating the new stuff.
I used to use Forti-diet. I'm not a fan. It didn'thave enough fiber for Mocha, and her poo would be a little squishy ondays she didn't eat much hay. I like Oxbow, but it isexpensive. Kaytee makes a decent Timothy pellet that's prettyinexpensive- you could try that. Some of the Purina typeslook good but I've never used them. Look for 16% protein orless and 18% fiber or more and less than 1% calcium.
On alfalfa vs. timothy pellets, many rabbits have lived long, healthylives on limited alfalfa pellets with free-fed timothy hay.Some rabbits have problems with excess calcium, which alfalfa has a lotof. Alfalfa also has more calories, so it can make adultrabbits a bit chubby. It's basicly up to what works for youand your rabbit. If he seems to be getting a lot of sludgyurine or is getting chubby despite limited pellets and treats andplenty of exercise, definately switch to timothy pellets.