Hey HKPunter.
Normally when i go I stay at the following:
- (Close to ASOK BTS) - close to Soi Cowboy and a short walk or tuk tuk ride to nana
- Westin Sukhumvit - 259 Sukhumvit Rd, Khlong Toei, Krung Thep Maha Nakhon 10110, Thailand
- Sheraton Grande Sukhumvit - 250 Sukhumvit Road, Bangkok 10110, Thailand
- JW Marriott ( Close to Nana and a short tuk tuk ride to cowboy).
- 4 Sukhumvit Road, Soi 2, Bangkok 10110, Thailand
I have never stayed at the hotels you suggested, but from looking at the map and from my knowledge of the lovely BKK, I would suggest
Bangkok Marriott Marquis Queen's Park (closeish to Cowboy, and very close to several massage parlors behind emporium)
199 Sukhumvit Soi 22, Klong Ton, Klong Toey Bangkok, Thailand 10110
I cant comment on the Bangkok Marriott Hotel Sukhumvit or the Raddison though. I usually stick to the 3 BTS stations (Nana, Asok and Phrom Phong).
Enjoy. Send me a PM if you want to hang cause i may be down there in march!
Look forward to your reports