Nice rig! Those stern seats look like they're a little higher and might be a little more comfortable than the OEM stern seats on many of the 20's!
Good choice on the motor - let us know how you like it! I'd highly recommend running nothing but XD-100 full synthetic oil in it and having dealer set the EMM for XD-100 only. Make sure the dealer runs the fuel system test on it where they check for pressure loss and air leaks between fuel tank and motor. This test is now standard procedure on a new installation at all the good dealers. I'm using about 100-150 gallons of gas/gal of oil on the XD-100 setting, so it's not worth cutting corners on the oil with that low usage rate. ARG Marine in Riviera Beach buys it in bulk and sells it for about $35/gal if you bring your own jug. Here's a great web site you might want to check out:
http://www.etecownersgroup.com/ Some very knowledgeable techs on there can answer just about any question you can think of (as well as many that you'll never think of!)