All your hours count. You don't start over with each additional rating. Now, whether the devices you listed are "Approved Flight Training Devices", that's a FSDO matter. Call DCA and ask them if their sims are approved as such.

Why don't you consider doing the commercial 141. If you are looking for the best financial decision in aviation, its not flying 250 total when you don't have to. Also, the FAA seems to hand out 141 certs to anyone who can write a syllabus. No matter what anyone says on here, most syllabi are not as constricting as they are made out to be...AND you could have your CFI with just over 200 hrs rather than just your commercial with 250.

The whole point of training is to do it in the fewest amount of hours (hours=money). Time building happens after that.