BOE.com
BBG
3Rivers

Bought my 8 from BOE and my lgc 4000
Bought my nmea 2000 (and all the goodies that go with it) from ThreeRiversMarine.com
Have talked to Brian at BBG very knowledgeable and he does a lot of business over the internet

3 Rivers has a unique selling point...if you have any problem with your unit (if you purchase it from them) send it back to them and they will replace it (while it is under warranty) and they will deal with the RMA thing

If and when I upgrade to the Gen2 I will go with Jim at BOE, but I would feel comfortable in dealing with any of those 3

One thing to consider...bottom dollar is not necessarily the BEST BUY