Ticket Tailor is an online ticketing platform with no per-ticket fees. Instead it's a monthly fee from just $25 (or £15) / month (and I'm the founder).
It's really easy to use, you can embed your box office in to your website, and it works with PayPal and/or Stripe for taking payments so you get paid directly.
Check it out: http://www.tickettailor.com/rf=clfm
Picatic has a cool program called Fairpay. Fairpay allows you to pay what you think their service is worth.
Picatic was recently named as one of the top 10 companies disrupting events! Give Jay and the team a visit at www.picatic.com
They are also a Canadian company based out of Vancouver!
Maybe giving us some more specifics would be a great start. Every SaaS solution has its own ups and downs. We even use multiple ticketing and registration services to overcome that fact.
My first question would be: What are your pain points with Eventbrite and what is the minimum feature set you need?