Yeah you've got a lot of time to think it over. I suppose April's not too bad in HK, although it does start to get humid and a bit more wet. November through the winter is the driest part of the year (still get light drizzles frequently), but Nov is nice and warm. Price-wise, there's a lot of ways you can save $ in HKG while not compromising too much on luxury. In off-season, you can stay in a harbor-view at IC for as little as low $2000's. If you're okay with non-harbor view, you could easily find a 5-star in Tsim Sha Tsui for $1800/night or less. Go to those fancy Cantonese restaurants for dim sum rather than dinner and the two of you can eat well for $600-700 (these are HKD). Anyways, I'm glad you liked Tokyo so much and are looking so forward to going back.