Before you make a decision, check out second hand prices for the Alpha. If the market in the US is anything like the UK, Chinese/Taiwanese/Korean bikes suffer from very high depreciation. You will want to sell your 250 at some stage, and it will be easier to sell a Yamaha, and you'll get a much better price for it.
You can carry your dive kit on a bike as well
You can carry your dive kit on a bike as well
