Plaza Athnee Meridien, Top of Wireless Road (opp. British Embassy) is excellent especially if you have access to their Executive Lounge.
For Chill out privacy, The Six Senses Spa / Evason at Pranburi 15 mins south of Hua Hin, in one of their private pool villas …wonderful!
If you want to be in Hua Hin, The Sofitel (old Railway Hotel) is stylish, convenient for the town, has its own beach and own private pool villas.
Hua Hin is understated compared to noisy brash resorts such as Pattaya and Phuket. 2 hour limo road from centre of Bangkok. Plenty of Golf Courses