Water in pump = water in tubes if you use it... Dry bag (tent bag works for bigger pumps) is a good idea. I keep my K-pump in dry box, handy if needed.
Another reason to go with K-pump: they're a family business, and will service your pump free of charge (you pay postage, I've even had them pay that for return) for pretty much forever. I bought my first one in 2006 or 2007, have rebuilt it twice myself and sent it in when developed a hairline crack in the top piece due to over-enthusiastic "help" - they sent me a new pump.
Agree with others in this thread about blowers: whatever is cheapest and gets your boat full. That said, I've had good luck for many years with LVM, just DO NOT hook to battery with engine running. They're designed to run on 12V, not the 14 your battery is receiving from alternator.