If you ask me? I would recommend below :

Common use Roomba 650 & 770 (but not as smart still in budget to be have one)
Smarter Neato XV Signature series (the biggest improved, maybe you can try this model now, these is quite reliable today)
Advance LG Roboking 6200 and above model (Roboking is the most quiet model, even function & feature still the advance, reliable is about same on Irobot too.)
Mopping the Scooba 390 only (Scooba 390 is good you can't do not have one, if you floors is biggest space or due to human can't work like robot to be able on runs here & there's, to have one can be solve all the problem, the only slightly noisy to compare all here, due to suction vacuuming the water up on dirty tank, so you may force to accept this machine)
Mint Plus is slightly in budget price, but for me is not useful, cause I don't have time to be monitor or change cloths for mint.

Hi if you ask me for personal, for sure is LG Roboking VR6260-62 model is best and smarter.

Cause most of Roomba will bang to toilet door and go in the 30-50mm height of drop for bang the water tap and kill himself.
Also Roomba picks up dust for 1 cycle in 1 Hour is not enough still can see somewhere got hairs on floor.

Roboking can give you feedback totally near to prefect can't see got hairs or dust at corner.

This is seriously.

Yap we are the only Local Distributor from selling LG Roboking since 2011 until today and specialist for repairs & services.

You pay a little bit higher price buy can make you happy that is more worth for money and return to you.

Everything refer here : www.kimirobotstore.com

Thank you

Don't worried, my www.kimirobotstore.com

Go to other robot & accessories for you needs