I carry a tarp both as backup shelter, and to cover my Eureka K2 XT while setting it up in the rain. It's a little bit of a hassle, but not as much as mopping out a wet tent or the mildew smell that comes from an insufficiently dried out tent.

Regarding the tent I link below, I realize it's a 4-person tent, a tent plus fly for 4-season camping, and it might be overkill for your needs. However, this Eureka Assault Outfitter 4 at the Eureka Tent outlet is a real deal at $199.00.

Normally it goes for $399.00, but the reason for the sale as stated is:
"FACTORY SECONDS-CAN NOT SELL AS NEW PRODUCT DUE TO LOWER WATER RATING ON FLOOR FABRIC IN RELATION TO THIS TENTS SPECIFICATIONS*. THESE TENTS HAVE A FLOOR COATING TO THE SAME SPEC AS OUR TIMBERLINE 4 (1000mm)."

You can add a floor saver for $13.99.