If you're an expat or a Bangkok-weary farang, this place is a MUST - it's not that far from the city (depending on traffic - take the tollways), and is in Bangkapi, far from the noise and pollution of Siam city centre. All the rooms are beautifully designed, with private jacuzzis in every room, and private swimming pools in the suites! The rates are very reasonable, we stayed in a gorgeous deluxe room for Bht1750. The hotel manager Jo was wonderful and helpful, always available. Service was impeccable (except for 1 annoying night manager), the hotel is clean and well maintained. Print a map before going - the taxi drivers don't have a clue where this place is. Mention Bangkapi, then Klonjan, then attempt to say Soi Yothin Pattana. At the start of this soi there's also a lovely small coffee house (with chocolate that is NOT ovaltine), and beside it is a relatively new Spa (the name is totally in Thai but it's called Ra Da). The manager speaks English and they offer very cheap massages and spa facilities. It's a wonderful place too!
Head to Siam Society for some quiet, romantic time together, and go to Ra Da Spa in the day (the hotel will recommend a much more expensive spa to farangs but check out this one at the end of the soi yourself, you won't regret it).