Camera dilemmas

Hi,

I am in the process of considering my next camera upgrade.

I have an Olympus OMD EM1 at the moment for underwater use and a Nikon D750 that I bought for a Safari recently. My problem is deciding if I should house the D750 or swap it for a D7200....

I have heard a lot of people saying that the full frame setups are heavy in comparison but looking at the Nauticam housing the D750 is lighter than than the D7200. So I guess its just the size of the dome port may be bigger for say a sigma 15mm compared with a Tokina 10-17, not a huge issue to me.

I mainly take large animal portraits or macro.

As far as Macro goes I am guessing a 105mm less on the D750 any disadvantages using this compared to a d7200?

Anyone use the D750 and can give me some feedback on how it performs?

If anyone has used both any guidance on how they compare would be great.

Regarding a D750, look at Ken Kurtis's: http://www.reefseekers.com/PIXPAGES/Indo%202015/Indonesia%202015%20-%20pix%20&%20links.htm

My wife recently switched from an EM1 to a D7200. She loves the D7200 and is very glad she switched.

If you go FX, the sigma 15 works very well with a 6" dome

Can't say about the D750 but I have a D7200 and love it. Still heavy..