Choccy although you may now feel yes for a child you know that at the time you felt no, and maybe your opinions are changing but maybe also you are remembering some things with rosy glasses, just maybe!
Why not try an adoption activity days with BAAF
www.baaf.org.uk/ourwork/activitydays
October
19 October – East Anglia Fully subscribed
25 October – West Midlands
November
16th November – Greater Manchester
22nd November – North East
These will feature harder to place children, I know, but the benefit is you do get to meet the children.
The other choice is Adoption UK exchange days.
www.adoptionregister.org.uk/adopters/exchange-days
Tuesday 2nd December 2014 – Walsall
Wednesday 21st Jauary 2015 - London
Thursday 19th March - Bolton
Wednesday 13th May - London
If we had not been matched in our area I am sure these events would have played a bigger part in our lives! I went to one Adoption UK exchange day in London and it was fabulous, well run, tons and tons of children of all ages from all over the country, just their profiles of course but also social workers and some foster carers to talk to. I mean it is very sad there are tons of children needing families 
but for those looking to adopt it is a good place to connect with information. Again, some children may be harder to place but some may not, I saw details of a lot of amazing children of all ages, different ethnicities, really a wide spectrum of ages and situations. It is emotional and draining etc but then tell me which bits of this are not!!
I know how you feel about the birth child element. The honest answer for us is this has been the hardest part, managing our dd's expectations and jealousy! And I would suggest you pursue a child who has as few 'issues' as possible because a birth child in the mix makes it harder.
However, I would also say what/which 'issues' you as a family can cope with is the real question. Originally, I had felt that I could cope with 'physical' problems well but when it came to it the though of lots of physiotherapy was something I was not sure about. Others may feel differently. It is personal. I would say our little boy has some anxiety issues. We did not 'choose' him for this reason but what is wonderful is I have had anxiety issues and overcame them with counselling about 15 years ago! So in many ways i think I am the sort of mum who (I really hope) cope with his anxiety and more to the point help him to cope with the issues, and (Please God) over come them.