Market Street in Colleyville has these real pretty flower basket cakes that would be cute for a shower. I've never actually priced them, but I've seen them in their bakery case and they are always so beautiful. You could get a mixed bouquet in pastel colors with the clear sparkly sugar crystals on them. That's one I've seen them do before and it's quite impressive to look at. Of course, I've not tasted one before so I have no idea if they are just great to look at or if they taste great too.
I personally love Costco cakes. They are huge and cheap and if you order it the evening before you need it, it's usually the freshest, best tasting cake around. The white cake and the chocolate cake are both good, but the cheesecake filling is the best in my opinion (I've tried the chocolate, strawberry and the cheesecake fillings). The best cake we ever got from them was a chocolate cake with cheesecake filling and cream cheese icing. People at my daughter's birthday party that year still rave about that cake whenever they see us. Good luck!