I don't normally do these but i just had to say something about the top notch customer service from David over at Shut-up-and-fish.com Click Here
I purchased the 999ci hd combo unit from him and its perfect. Had to have it professionally installed cause i didn't want any errors doing it myself. Came out 100% even the transducer mounting, which i thought would take a few minor tweeks.
All in all the best part about David is you can call/text/ or pm him on here and he will respond in less than 5 minutes.
If you looking for fishing supplies give him a call customer service is everything to me and he did a great job and texted with me the whole way.