If you're only going to be using these reels, on rods that will always be in a rod holder, then most any decent baitcaster will work fine.
The only time I'd consider spinning only, is when the outfit will be used for casting, or when always held in hand methods are used.
Now, with that said ... if you have two new rods coming, you'd be better served to put the proper matching type of reel on them, according to whether they're spinning or baitcasting rods.
... cp