Excal is a great bow. I have 2 of the Matrix series. Have had them since xbow opened in ny.
You can change a string in 5 minutrs and be back hunting.
There is a lifetime limb warranty (I never had a break yet)
And Dawn will always help you if you call Excal with a question.
Does the grizzly have a plastic rail tho? Might be worth it to find one with the aluminum rail. More durable.
The matrix 310 is still affordable. Not made anymore, but you can still find them online.
That said, you still can't go wrong if you decide on the grizzly.
Also, I can't stress enough the importance of the ADF. Anti dry-fire system.
If not included with your bow, it is worth the extra $.