I use a SH handheld, had no problems with it. (Over 2yrs old)
The fixed one Poly has linked does look tempting- however, have you space for an aerial.?
My handheld works for me in The Solent, I'm always in sight of land and usually not far from other boats- with the added assurance that if I do leave the boat- the VHF comes with me.!
Can't think what model mine is, but I believe it was the 1st handheld to have DSC.
Can't comment on the Icom as I've never owned one, but did use a fixed one on my VHF course- and would prob buy one if I had room for a fixed unit+ aerial.