Only you can answer whether a new iPad is worth it to you!
Which iDevice do you use more often? iPhone or iPad?
Do you need/want an iPad that has more modern and more up to date features that are closer to your iPhone 7?
The new 2017, iPad 5 (5th generation to just have the singular iPad name) is a very good iPad for its budget pricing.
So, if you want the much larger screen of an iPad, then go for it!
Good Luck to You!