you might also look at the MXT. It's a great all-around unit. It can be used for coin, jewelry, relics and nugget hunting. It's a good beach machine, from what I understand, but I haven't had a chance to try it at the beach personally. It has the best selection of optional coils for all of the above venues, and you can swing it fast or slow with excellent results.
Another good, all-purpose, unit is the XL Pro. Good selection of coils too. It's a faster swing unit though.
A CZ can be used for all of the above types of hunting too, however it's a slow sweep, and geared more toward coins and jewelry, but will find relics, and works great at the beach.
I use all three of the above, and can therefor recommend them highly.
Hope this helps,
OldeTymer
TheTreasureLeague.com