You're right OP. Everywhere in MK takes no more than 10-15 minutes to reach. The only exception being if the M1 and A5 are snarled up, as it has a knock on effect with the grid roads.
A PP was right that you're near to the A421 in Wavendon and Walnut Tree, which can get busy too.
If you're seeking somewhere close to the M1, maybe consider Newport Pagnell, it's well established as it's a lot older than MK, with a lovely High Street full of shops, pubs and restaurants.
Another PP was right to avoid any estates with roads and streets laid out in extact straight lines, they tend to be the less desirable areas, although I can't say I've ever felt unsafe when visiting those estates for whatever reason.
I'd recommend you come up here for a weekend and drive around, get a feel for the place. I personally find the brand new estates a bit soulless (and as an MK lover, I hate using that word!), I much prefer the villages and hamlets inside MK... Simpson Village, Middleton / Milton Keynes Village, Bradwell Village, Loughton, Great Linford, Shenley Church End and Woolstone.
Other notable nice estates are Great Holm, Willen, Shenley Brook End and Bancroft.
Plus you have the MK cornerstones of Wolverton, Newport Pagnell, Bletchley, Fenny Stratford and Stony Stratford. Although these areas are hit and miss and a mix of gorgeous homes with less desirable pockets of houses.
Feel free to PM me if you need any help. Also we have houses for rent advertised on the intranet at my work, so I'm happy to send you any of you decide to pursue a move.