Property value up 50% in 3 years, what would you do?

[Matt Bowers]

Hi all - I'm curious what everyone would do in my position. Happy to hear all opinions, and thanks in advance. 

My wife and I are hoping to build a portfolio for long term buy and hold. We have two properties right now. One, we purchased in 2013 for $500k with $100k as down payment. The property is worth about $800-900k now. Lucky. Mortgage is 30 yrs at 3.25%, full payment incl ins and taxes is about $2300/mo. It rents for $5700/mo. 

Now we've got about $450k equity in it... what would you guys do? I'm tempted to hold on to it, but I know other people would 1031 into something bigger?

Sorry if this is in the wrong forum... it was a tough choice.