Does any one have a preference as to what tool they like to use when removing and reinstalling the front and rear sight? I was looking at either purchasing a Sig Sauer Classic Pistol Front, Rear Sight Adjustment Tool  or one made by Maryland Gun for Sig.
Thanks

Unless you are going to be installing a LOT of Sig sights, do yourself a favor and get a universal tool over a make specific tool.

When fitting any sights, proper fittment (filing or use of a sanding block) is much more important than having a special sight pusher.  I usually install sights with a aluminum or brass punch after fitting.  I only use a pusher to remove or make adjustments to a sight that's already installed.

I also recommend using a dab of red Loctite on dovetail sights when installing.

I have the MGW for classic P-series. Works great, but doesn't fit P320's.

I've been looking for a 320 specific sight tool for a year.  Anybody know of a good universal one that works well with the 320.  David

I was looking at the MGW Sig tool for the classic pistols. I'm afraid of a general use tool since I will really use it on my Sigs. Altough I appreciate the suggestion.  Any preference on sights? I was thinking about trying the Trijicon sights as opposed  to the SigLites.

The SigLite sights are much nicer than the regular 3-dot Trijicons IMHO.  

Well SigLites it is then, thanks.