The newer XM units now have built in FM mods also.

The newer Delphi piece have built in memory of up to 30 minutes,

Most of the units are similar, I carry all of the products, I haven't had any bad expereinces to give you an thumbs up on one or another.

The one thing is to make sure all you bases are covered, home kit, multiple car kits, boom box, and the look, make sure you like the look, cause you will be looking at it alot.

Give me some model numbers and I'll get you some prices