I would normally say no tips, but with that rear bumper I'd say go with the tips. MRT used to have some black chrome 3" rolled tips, too. Might wanna consider those, but they were pretty pricey if I remember correctly.
I wouldn't do them in black. Maybe you could find a matte silver or grey. They need to be seen but, just a little. It is more menacing, with the slight silver cast to them. Kinda like having a pistol pointed at you.
thanks, man. not in a hurry to do this (it's on the list, but behind the new front bumper--same one i have now, but not cracked, hehe) but PM me pics and the specs and i'll keep it in my inbox.