Dude, search button is our friend. I think Titan has been talked about a good bit here, and a lot over on JU. Nobody has had anything bad to say about them, but not to many people have used them. If you live near them (which I see you don't) than I might take them up on there warranty offer, but it's almost usless if you take into account shipping which they won't pay for (and that's with you pulling/installing the motor). Golen knocked off $200 for me while I was in Iraq, but that didn't even cover shipping. If you are on a budget, bite the bullet and build one yourself.
Also, if your not putting out more than 250hp with a bone stock head on even a 4.6L at the fly, your either using a weak ass cam or something's not working right. My Golen 4.6L is rated at 260hp with only 9.1:1 comp, a bone stock head, normal bolt ons (62mm TB, header, intake, etc.), and an old style intake manifold. That has been verified by JP Mag. I've got a new style port matched intake manifold, Roller Rockers, adjustable CPS with pretty advanced timing, and a light P&P on the head bowls and runners. I'm pretty sure I'm putting down around 270hp to the flywheel. Even if I'm over estimating, I can assure you it's more than 250hp. Granted, I have a big old cam (.493 intake, .512 exh.), but still, 250 hp max for a 4.7L is a little underated. BTW, I just looked at the Golen site and it looks like they are using a slightly less aggressive cam now (.447 & .493), which should be better for low end torque, but maybe less peak HP.