The primary schools are as good as the secondaries in general. I went to Bearsden Primary - which was a good school, and as far as I am aware (this was a very long time ago - but we were talking about this very subject last night at dinner at my parents, who live just outside Milngavie/Bearsden), all of the feeder primary schools to Bearsden, Boclair and Douglas Academies are good. So are the primaries in the West End although (according to my brother), some people are a bit snobbish abbut them, to justify to themselves why they are sending their kids to private schools.
According to my dad though, he was told by his (medical) collegaues that he was doing irrepareable damage to his children's education by sending us (0ver 30 years ago!) to the local schools. Bearsden Primary, for goodness sake! It still amuses my dad that my year at Bearsden Academy got the best results in Strathclyde - 5 or 6 of us got 6 "As" for our Highers!
I don't know so much about East Ren - although it generally has a good reputation and Bridge of Weir/Houston has the sort of demographics that would suggest good schooling. (and the house prices to match!)
A word of warning about Jordanhill - although I suspect you realise this already.... about 6 years ago we looked at a house there, looking for offers over £140k. It SURVEYED at £160k, plus the roof probably needed doing. We offered £160k (knowing that we wouldn't get it, but we'd already had to do the survey) - and we believe it went for £210k!
We ended up buying (a year later) in Pollokshields, where you can buy great houses for a fraction of the prices in the West End/Bearsden/Milngavie or further out (where we had spent the previous 2 years looking).
The only - major - problem is schooling. Ds is 3 and it pains me (politically) to say that we are having to consider private schooling. The problem is that round where we are there is a very large Indian/Pakistani community. That in itself is not a problem for me - what IS the issue is that 90% of the kids starting primary shcool cannot speak a word of English. There are three primary schools close by and we have heard that the headmistress at one of them (unfortunately the furthest away one) is brilliant (in fact she has an MBE for services to education), so we want to find out HOW the schools deal with those kids who DON'T need the extra attention to bring them on in English. I don't want my son treading water for those previous first few months in school. He's a bright kid and would get bored - and might start not to like school. But it may be that we are reassured once we visit the schools - and part of me would LIKE for him to have the opportunity to be exposed to other cultures and languages - as long as it doesn't compromise the rest of his education.
According to my child minder, Shawlands Primary has got quite a good reputation (it's just a wee bit too far for us) - although there are some Asian kids, there are not quite the same numbers/problems with integration.
What sort of price range are you looking at?
HTH