is the best filtration you can get. What guy?... 25-30 lbs would be good. Can you do a FO
tank w/out LR
.. Yes. is it as nice IMO
no. You said you had the $$ so I would spend the cash and do it right from the beginning.
And No tangs at all in a tank that small. You would need a min of 55gal tank for 1 yellow tang, they recommend a 75 for that fish.
the clowns, gramma and blenny are good choices the flames are nice also. You do not want to overload the tank with to many fish.
Keep reading and learning before you buy anything.... I know a lot of guys who have a bunch of stuff in the basements that did not work. They listened to a LFS
and they sold them a bunch of useless stuff. Keep doing your home work..