Insulation resistance and continuity meter

[HandySparks]

I'm thinking of buying a combined IR and continuity meter for fault finding on domestic and commercial installations. I'd like something that's smaller, lighter and easier to handle than my Fluke MFT and fairly robust. It would also act as a partial backup in the event that the MFT is out of use.

I don't need a memory or download capability.

Anyone used any of the following:
Martindale IN2102/IN2103
Megger MIT400/410/420
or, maybe,
Fluke 1503 and 1507

If so, any comments?

Apologies if you've read this elsewhere.