In general, I don't love lli in a name. It makes me go a bit cross-eyed trying to read it. So I would definitely choose
Alison.
Nothing wrong with
Taylor Alison at all.
Alison PaigeAlison AmelieAlison EliseAlison Katherine (is the
Alison I know) - nn AliKat
Alison KaterinaAlison KatrinaAlison JuniperAlison PearlAlison MaeAlison JodiAlison RIleyAlison TaylorAlison MorganaAlison Jada
Three boys nappin', one mama namenerdin'
To peruse my top 100ish names:
http://www.behindthename.com/pnl/82589
"My Inner Birthing Mother Paddles a Canoe" and other non-name musings
found on my blog:
http://jodifriesen.blogspot.ca/2014/07/paddle-power.html