Without knowing what your future plans are for electronics, your style of fishing and where you fish the most, that is a difficult question to answer.
But if you are just comparing those two units. Go with the H7. It's a Gen 3 and a H7. Both are minimum requirements to network with another unit in the future. Plus the H5 screen is so small that SI would not be very useful anyway.
That is a great price on the H7 and if it is really in stock, get it right away. I would call them first and verify they have it because nearly everything is on a national backorder right now.
FDx Custom Rods